Lets ay there is a 0.5 Earth mass and 0.8 Earth radii planet orbiting a Sun like star at the same distance Earth is orbiting its Sun. Its atmospheric pressure would be 0.03 bar. Water boils at 75 degrees F at this pressure. How could an organism living on the surface survive? Another question....Lets say the organisms body temperature was 80 degrees F. Would the water within the organism boil off due to the low atmospheric pressure or could the outside pressure have no affect? If it could be prevented how?